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    Functions and Arrays

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    krishna mohan pandey
    The document discusses different types of functions in C programming including standard library functions, user defined functions, and types of user defined functions. It also discusses arrays in C including how to declare arrays, types of arrays, and important notes about arrays.

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    Functions and Arrays

    Uploaded by

    krishna mohan pandey
    27 views11 pages
    The document discusses different types of functions in C programming including standard library functions, user defined functions, and types of user defined functions. It also discusses arrays in C including how to declare arrays, types of arrays, and important notes about arrays.

    Original Description:

    AVR Programming Lecture 6

    Original Title

    Lecture 6

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    The document discusses different types of functions in C programming including standard library functions, user defined functions, and types of user defined functions. It also discusses arrays in C including how to declare arrays, types of arrays, and important notes about arrays.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    27 views11 pages

    Functions and Arrays

    Uploaded by

    krishna mohan pandey
    The document discusses different types of functions in C programming including standard library functions, user defined functions, and types of user defined functions. It also discusses arrays in C including how to declare arrays, types of arrays, and important notes about arrays.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    You are on page 1of 11

    Lecture 7

    Functions And Arrays


    C Programming Functions

     A function is a block of code that performs a


    specific task.
     Suppose, a program related to graphics needs

    to create a circle and color it depending upon


    the radius and color from the user. You can
    create two functions to solve this problem:
     create a circle function
     color function
    Types of functions in C programming

     Depending on whether a function is defined


    by the user or already included in C
    compilers, there are two types of functions in
    C programming
     There are two types of functions in C

    programming:
     Standard Library Function
     User Defined Functions
    Standard Library Function
     The standard library functions are built-in
    functions in C programming to handle tasks
    such as mathematical computations, I/O
    processing, string handling etc.
     These functions are defined in the header file.

    When you include the header file, these


    functions are available for use.
     For Example-

    printf , scanf , getchar , getch etc these all are


    available in stdio.h header file
    User Defined Functions
     C languages allow its programmers to define their own functions according to
    their requirement and simplicity of the program. Such type of functions created
    by the user are called as user-defined functions.
     How user-defined function works?

    #include <stdio.h>
    void functionName()
    {
    ……..
    }
    int main()
    {
    …..
    functionName();
    ……
    ……

    }
    How Functions works in C?

     The execution of a C program begins from


    the main() function.
     When the compiler encounters 

    functionName(); 
    inside the main function, control of the program jumps
    to
    void functionName()
    And, the compiler starts executing the codes inside the
    user-defined function.
     The control of the program jumps to statement next

    to functionName(); once all the codes inside the


    function definition are executed.
    Types of user defined functions
    In C programming, user defined functions are
    defined in four types.
    They are-
     Functions with no argument and no return

    value.
     Functions with no argument and with return

    value
     Functions with argument and with return

    value
     Functions with argument and no return value
    Arrays in C Language
     An array is a collection of data that holds
    fixed number of values of same type. 
     For Example:

    If you want to store marks of 100 students, you


    can create an array for it.
    float marks[100];
    How to declare an array in C?
    data_type array_name[array_size];
    Types of Array
     Arrays are classified into two types-
    (1) One Dimensional Array
    (2) Multi Dimensional Array
    Few important notes:
     Arrays have 0 as the first index not 1.
     If the size of an array is n, to access the last

    element, (n-1) index is used.
    Thank You

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